Tripwire Interactive announces the release of the SDK for Red Orchestra 2: Heroes of Stalingrad, allowing for the modification of their World War II shooter sequel. The SDK is offered through Steam for all owners of the game (it can be installed via the "tools" tab). Here's word on the release, and some of the projects it is already helping to create:

Tripwire Interactive are pleased to announce the release of the modding and map making tools for Red Orchestra 2, available free to everyone that owns Red Orchestra 2. While the limited functionality preview versions of the SDK have been available to select modders for a while, this release now makes the full capabilities of the Mod SDK available to everyone. Users can now make and publish everything from simple mods and mutators, through custom maps and on to full total conversion mods.

Modders and map makers have been hard at work with the pre-release SDK and several great maps and mods are already coming together. For a preview of what is to come, check out these three total conversion mods already in production for Red Orchestra 2: